gdb 6.2 blockers

[Andrew Cagney]

> ac> - 1650 is an issue, but even there I'm wondering how much.  It's ticking 
> ac> a horrible nasty race condition and may not be a real problem in the 
> ac> field - do people really run 100 thread programs using linuxthreads.
> 
> 1650, manythreads.exp, works every time with gdb 6.1.1.
> So if there's a kernel race condition then gdb does not trigger it
> and gdb HEAD does.  This is a user-visible regression.

BTW, I did try to reproduce this bug.  Mainline GDB and manythreads.exp 
appear to work everytime on NPTL based FC2 and RHEL2 GNU/Linux systems 
(well at least for the 30+ test runs I tried).  That wasn't the case 
with 6.1.

We should probably mention this fix in the NEWS file, and the apparent 
linuxthreads regression in PROBLEMS.

Andrew